Phase-synchronization of daily motor activities can reveal differential circadian patterns |
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| Authors: | Dancsházy Zsolt Dér András Groma Géza I Janka Zoltán Járdánházy Tamás Makai András Szentistványi István Vasadi Anna |
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| Affiliation: | a Institute of Biophysics, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungaryb Department of Psychiatry, University of Szeged, Hungaryc Department of Neurology, University of Szeged, Hungaryd Department of Physics, University of Szeged, Hungarye Outpatient Psychiatric Care Units, Szeged, Hungary |
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| Abstract: | The aim of the study was to determine any alteration of the 24 h motor activity pattern of a bipolar patient in different mood states. Actigraphic records were collected on an outpatient basis for a total of 387 days. The daily actograms were synchronized in phase to the time of morning awakening before averaging, which significantly enhanced the structure of the averaged traces. The actograms were divided into three groups based on total daily count. The daily motor activity patterns of the low- and high-activity days have a different circadian pattern. We propose it may have a relevance to the different mood states. The phase-synchronization of the 24 h actograms to the patient's sleep-wake cycle, specifically to the time of awaking from the nighttime sleep, may help reveal differences in the daily temporal patterns of motor activity. |
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| Keywords: | Actogram time pattern Bipolar disorder Phase-synchronization Circadian rest/activity rhythm |
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